Thirteen people were injured, three of them seriously, when a bus carrying teenagers from Wales tipped over on a motorway in eastern France on Saturday, the local gendarmerie said.
The bus, heading for Italy, crashed on its side on a motorway near Lons-le-Saunier, near the Swiss border, they said.
Forty-eight people were on board the bus, most of them aged 14 to 17.
The bus ended on its side in a ditch. Two helicopters were dispatched to the site.